package config

import (
	"context"
	"os"
	"path/filepath"
	"testing"
)

func TestLoadDefault(t *testing.T) {
	cfg := LoadDefault()
	if cfg.Model != "gpt-4o" {
		t.Errorf("expected default model 'gpt-4o', got %q", cfg.Model)
	}
	if cfg.Provider.Type != "openai" {
		t.Errorf("expected default provider 'openai', got %q", cfg.Provider.Type)
	}
}

func TestYAMLLoader_NoFile(t *testing.T) {
	loader := NewYAMLLoader()
	ctx := context.Background()
	cfg, err := loader.Load(ctx, "/tmp/nonexistent_workdir_12345")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if cfg.Model != "gpt-4o" {
		t.Errorf("expected default model, got %q", cfg.Model)
	}
}

func TestYAMLLoader_WithFile(t *testing.T) {
	tmpDir := t.TempDir()
	yaml := `
provider:
  type: anthropic
  model: claude-sonnet-4.5
  api_key: test-key
`
	if err := os.WriteFile(filepath.Join(tmpDir, "rony.yaml"), []byte(yaml), 0644); err != nil {
		t.Fatal(err)
	}

	loader := NewYAMLLoader()
	ctx := context.Background()
	cfg, err := loader.Load(ctx, tmpDir)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if cfg.Provider.Type != "anthropic" {
		t.Errorf("expected provider 'anthropic', got %q", cfg.Provider.Type)
	}
	if cfg.Provider.Model != "claude-sonnet-4.5" {
		t.Errorf("expected model 'claude-sonnet-4.5', got %q", cfg.Provider.Model)
	}
	if cfg.Provider.APIKey != "test-key" {
		t.Errorf("expected api_key 'test-key', got %q", cfg.Provider.APIKey)
	}
}

func TestYAMLLoader_PreservesDefaults(t *testing.T) {
	tmpDir := t.TempDir()
	yaml := `
provider:
  type: openai
  model: gpt-4o-mini
`
	if err := os.WriteFile(filepath.Join(tmpDir, "rony.yaml"), []byte(yaml), 0644); err != nil {
		t.Fatal(err)
	}

	loader := NewYAMLLoader()
	ctx := context.Background()
	cfg, err := loader.Load(ctx, tmpDir)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	// Should still have default logging config
	if cfg.Logging.Level != "info" {
		t.Errorf("expected default logging level 'info', got %q", cfg.Logging.Level)
	}
}